Challenger CE1020 U is a 1-pole, 20 A circuit breaker rated for 277 V AC, designed as a molded-case protective device for branch circuits in panelboards. The CE1020 U designation appears in catalogs alongside CH1020 as the same 20 A, 277 V, 1-pole Challenger breaker. This molded-case breaker is intended for use in commercial and industrial electrical installations that require overcurrent protection for 277 V circuits.
